TY JOUR TI TECHNICAL DIAGNOSTICS-GUARANTEE OF HIGH-QUALITY AND EFFECTIVE MAINTENANCE OF TIMBER ROLLING STOCK KW technical diagnostics KW timber rolling stock KW efficiency KW quality JO Forestry Engineering Journal AU Yakovlev, K.A. AU Legostaev, S.A. PY 2021 IS 10 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov